128830736 has 10 divisors (see below), whose sum is σ = 249609582. Its totient is φ = 64415360.

The previous prime is 128830679. The next prime is 128830739. The reversal of 128830736 is 637038821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 128686336 + 144400 = 11344^2 + 380^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128830736.

It is not an unprimeable number, because it can be changed into a prime (128830739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4025945 + ... + 4025976.

Almost surely, 2^128830736 is an apocalyptic number.

128830736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128830736 is a deficient number, since it is larger than the sum of its proper divisors (120778846).

128830736 is an equidigital number, since it uses as much as digits as its factorization.

128830736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8051929 (or 8051923 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 128830736 is about 11350.3628135844. The cubic root of 128830736 is about 505.0563424377.

The spelling of 128830736 in words is "one hundred twenty-eight million, eight hundred thirty thousand, seven hundred thirty-six".